176 lines
4.5 KiB
C
176 lines
4.5 KiB
C
/*
|
|
* 86Box A hypervisor and IBM PC system emulator that specializes in
|
|
* running old operating systems and software designed for IBM
|
|
* PC systems and compatibles from 1981 through fairly recent
|
|
* system designs based on the PCI bus.
|
|
*
|
|
* This file is part of the 86Box distribution.
|
|
*
|
|
* Implementation of the Dell 486 and 586 Jumper Readout.
|
|
*
|
|
* Register 0x02:
|
|
* - Bit 0: ATX power: 1 = off, 0 = on.
|
|
*
|
|
* Register 0x05:
|
|
* - Appears to be: 0x02 = On-board audio enabled;
|
|
* 0x07 = On-board audio disabled.
|
|
*
|
|
* Register 0x07:
|
|
* - Bit 0: On-board NIC: 1 = present, 0 = absent;
|
|
* - Bit 1: On-board audio: 1 = present, 0 = absent;
|
|
* - Bits 4-2:
|
|
* - 0, 0, 0 = GXL;
|
|
* - 0, 0, 1 = GL+;
|
|
* - 0, 1, 0 = GXMT;
|
|
* - 0, 1, 1 = GMT+;
|
|
* - 1, 0, 0 = GXM;
|
|
* - 1, 0, 1 = GM+;
|
|
* - 1, 1, 0 = WS;
|
|
* - 1, 1, 1 = GWS+.
|
|
*
|
|
* Authors: Miran Grca, <mgrca8@gmail.com>
|
|
*
|
|
* Copyright 2025 Miran Grca.
|
|
*/
|
|
#include <stdarg.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <wchar.h>
|
|
#define HAVE_STDARG_H
|
|
#include <86box/86box.h>
|
|
#include "cpu.h"
|
|
#include <86box/timer.h>
|
|
#include <86box/io.h>
|
|
#include <86box/device.h>
|
|
#include <86box/machine.h>
|
|
#include <86box/sound.h>
|
|
#include <86box/chipset.h>
|
|
#include <86box/plat.h>
|
|
#include <86box/plat_unused.h>
|
|
|
|
typedef struct dell_jumper_t {
|
|
uint8_t index;
|
|
uint8_t regs[256];
|
|
} dell_jumper_t;
|
|
|
|
#ifdef ENABLE_DELL_JUMPER_LOG
|
|
int dell_jumper_do_log = ENABLE_DELL_JUMPER_LOG;
|
|
|
|
static void
|
|
dell_jumper_log(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
if (dell_jumper_do_log) {
|
|
va_start(ap, fmt);
|
|
pclog_ex(fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
}
|
|
#else
|
|
# define dell_jumper_log(fmt, ...)
|
|
#endif
|
|
|
|
static void
|
|
dell_jumper_write(uint16_t addr, uint8_t val, void *priv)
|
|
{
|
|
dell_jumper_t *dev = (dell_jumper_t *) priv;
|
|
|
|
dell_jumper_log("Dell Jumper: Write %02x\n", val);
|
|
|
|
if (addr & 1) switch (dev->index) {
|
|
default:
|
|
dev->regs[dev->index] = val;
|
|
break;
|
|
case 0x02:
|
|
dev->regs[dev->index] = val;
|
|
if (val & 0x04)
|
|
/* Soft power off. */
|
|
plat_power_off();
|
|
break;
|
|
case 0x05:
|
|
dev->regs[dev->index] = (dev->regs[dev->index] & 0x02) | (val & 0xfd);
|
|
if (machine_snd != NULL) switch (val & 0x05) {
|
|
default:
|
|
case 0x05:
|
|
sb_vibra16s_onboard_relocate_base(0x0000, machine_snd);
|
|
break;
|
|
case 0x00:
|
|
sb_vibra16s_onboard_relocate_base(0x0220, machine_snd);
|
|
break;
|
|
}
|
|
break;
|
|
case 0x07:
|
|
break;
|
|
} else
|
|
dev->index = val;
|
|
}
|
|
|
|
static uint8_t
|
|
dell_jumper_read(uint16_t addr, void *priv)
|
|
{
|
|
const dell_jumper_t *dev = (dell_jumper_t *) priv;
|
|
uint8_t ret = 0xff;
|
|
|
|
dell_jumper_log("Dell Jumper: Read %02x\n", dev->jumper);
|
|
|
|
if (addr & 1)
|
|
ret = dev->regs[dev->index];
|
|
else
|
|
ret = dev->index;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
dell_jumper_reset(void *priv)
|
|
{
|
|
dell_jumper_t *dev = (dell_jumper_t *) priv;
|
|
|
|
dev->index = 0x00;
|
|
memset(dev->regs, 0x00, 256);
|
|
|
|
if (sound_card_current[0] == SOUND_INTERNAL)
|
|
/* GXL, on-board audio present, on-board NIC absent. */
|
|
dev->regs[0x07] = 0x02;
|
|
else
|
|
/* GXL, on-board audio absent, on-board NIC absent. */
|
|
dev->regs[0x07] = 0x00;
|
|
}
|
|
|
|
static void
|
|
dell_jumper_close(void *priv)
|
|
{
|
|
dell_jumper_t *dev = (dell_jumper_t *) priv;
|
|
|
|
free(dev);
|
|
}
|
|
|
|
static void *
|
|
dell_jumper_init(const device_t *info)
|
|
{
|
|
dell_jumper_t *dev = (dell_jumper_t *) calloc(1, sizeof(dell_jumper_t));
|
|
|
|
dell_jumper_reset(dev);
|
|
|
|
io_sethandler(0x00e8, 0x0002, dell_jumper_read, NULL, NULL, dell_jumper_write, NULL, NULL, dev);
|
|
|
|
return dev;
|
|
}
|
|
|
|
const device_t dell_jumper_device = {
|
|
.name = "Dell Jumper Readout",
|
|
.internal_name = "dell_jumper",
|
|
.flags = 0,
|
|
.local = 0,
|
|
.init = dell_jumper_init,
|
|
.close = dell_jumper_close,
|
|
.reset = dell_jumper_reset,
|
|
.available = NULL,
|
|
.speed_changed = NULL,
|
|
.force_redraw = NULL,
|
|
.config = NULL
|
|
};
|